Analysis of influence of the power plant ash storage yard on groundwater environment

The fluoride contained in the filter liquor produced by fly ash in the thermal powerplant which takes the coal as fuel can lead to groundwater pollution. Therefore, it is of greatsignificance to study the migration characteristics of the pollutants in groundwater, in order tocontrol and prevent the groundwater fluoride pollution. By adopting the numerical modelingmethod, this paper takes the ash-storage yard of Shahe Power Plant in Xingtai City as anexample, to study the characteristics of fluoride migration in phreatic water, and establish atwo-dimensional groundwater flow and water quality model on the basis of the hydrogeologicaicondition analysis in this study area. Meanwhile, based on the Vmodflow software, themigration regulation of the fluoride in groundwater has been simulated. Because the phreaticaquifer of this area belonging to the Shahe alluvial-diluvial sediments and with a coarselithology as well as high permeability, the migration and diffusion ability of the fluoride in thisarea is relatively strong. It turns out that the longest migration distance in 5 years is 892 m andthat within 8 years is 1 515 m.